.app_container {
    height: 100%;
}

.app_header {
    height: 8%;
    background-color:deepskyblue;
    display: flex;
    align-items: center;
}

.app_header a {
    color: white;
    flex: 1;
    text-align: center;
}

.app_header a:hover {
    color: red;
    font-weight: 700;
}

.app_content {
    height: 84%;
    background-color: greenyellow;
}

.app_footer {
    height: 8%;
    background-color: grey;
    display: flex;
    justify-content: center;
    align-items: center;
}